Following a personal tragedy, florist Persimmon 'Simmy' Brown has moved to the Lake District to be nearer her parents. But her peace is shattered when, at a wedding, the bride's brother is found brutally murdered. As the florist of the wedding and one of the last people to talk to Mark Baxter alive, Simmy gradually becomes involved with the relatives. When events take another sinister turn, Simmy finds herself at the heart of a murder investigation. The chief suspects are the groom and his closely knit band of bachelor friends. They are all intimidating, volatile and secretive but which one is a killer?